![]() This makes flexures a critical design feature used in optical instrumentation such as interferometers.ĭue to their mode of action, flexures are used for limited range motions and cannot replace long-travel or continuous-rotation adjustments. Flexures are able to achieve much lower resolution limits (in some cases measured in the nanometer scale), because they depend on bending and/or torsion of flexible elements, rather than surface interaction of many parts (as with a ball bearing). Additionally, conventional bearings or linear slides often exhibit positioning hysteresis due to backlash and friction. High precision alignment tasks might not be possible when friction or stiction are present. In the field of precision engineering (especially high-precision motion control), flexures have several key advantages. Using compound flexures, complex motion profiles with specific degrees of freedom and relatively long travel distances are possible. Since single flexure features are limited both in travel capability and degrees of freedom available, compound flexure systems are designed using combinations of these component features. Notch flexure- thin cutout on both sides of a thick piece of material, constrains 5 degrees of freedom.Blade flexure- thin sheet of material, constrains 3 degrees of freedom. ![]()
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